Machine for molding floor slabs



Dec. 4, 1934.

F. MA VENZIE MACHINE FOR MOLDING FLOOR SLABS 2 SheetsSheet l Filed Nov. 18, 1951 ATToRNEY.

INVENTOR. /F/vz Dec. 4, 1934. F. M. vENzlE MACHINE FOR MOLDING FLOOR SLABS Filed Nov. 18, 1931 2 Sheets-Sheet 2 NN mw. @MNM O Patented Dec. 4, 1934 UNITED srAfrss rArENT i z 3V Claims.

invention relates to apparatus forfthe molding 0f; floor Slabs as .used in building @0n- Stlnciions, as. for examplev the `1100i Slabshcwn my Patent No. 1,891,513-

One object of the present invention is to provide a simple, compact, and efficient, machine which ma;7 be conveniently handled by. the 0p,- eretnr t0 forml upon the under face of .a licor slab a plurality of pendantiianges.

A further. object` 0f the presentY invention is to provide a. machine 0f this character in winch the depth of the pendant flanges may be readily varied by suitable adjustments upon the machine.

A fin-ther object 0f the present invention is to provide a machine of the` characterl stated provided with a vertically movable table cop-,operative with a plurality of iied. ribs, whereby variations maybe secured in the depth of the` pendant flanges upon the floor slabs.

A further object of the present` invention is t0 provide. a. machine of the` character stated in which there is provided a removable frame above said; movable. table for co-operating with the table parts in the molding of floor slabs.

A still; further object isA to. provide. afmachine of the character stated in which slabs may be cast both the length and. the height of which may be predetermined to meet existing. conditions in building structures.

A still further object of they present invention is to provide a machine of the character stated in which provision is made both for the molding of slabs as to different lengths and different heights.

Other and further objects of the present invention reside in the provision of general details of construction and in the arrangement, combination, and connection of parts for attaining the results sought by the foregoing objects.

The invention consists of the novel construction hereinafter described and nally claimed.

The nature, characteristic features and scope of the invention will be more fully understood from the following description taken in connection with the accompanying drawings forming part hereof, and in which:

Fig. 1 is a top or plan View of a machine embodying the invention, with the removable frame omitted;

Fig. 2 is a view in side elevation of the machine illustrated in Fig. 1 with the removable frame in operative position;

Fig. 3 is a view in section taken upon the line 3--3 of Fig. 1;

(Cl. 2in-411).v

Fis. 4 is @View inaction taken nenn` the. line.

4-4 0f Fis. 37:. Y

Fig. 5 is a fragmentary view in `plan ofthe .removable frame Shownin Fiss.. 2 and 3;

, Fig. 6 is an end view, cfj the construction shown 4in Fis.- 5..; i

Fig. 7 end view of one1 of the door slabs; Fig. 8 is a view in side elevation of the slabs shown in Fig. 7,A v

For the purpose of illustrating my invention I have Shnwn in. thenccompanyng: drawings one form thereof which is at present preferred by me, since the same. has been foundin practice to sive.. Satisfactory andieleble results.; although ii is t0; he understand tiinttineAv various; instrumentalities'of.: which my. ihveniipnnonsists can be varicnnlvy arranged `and organized. i and; that my invention is vnot limited, to the. precise arrangement andorganizationof the. instrumentalities. as herein. shown and described.

Referring now; t0 the drawings; detail, the

lefel'ence numeral 10 degltes: ai. Phil" 0f. end StarMinnieA which Support at their topa @horizontallydisnosef fwme 1.1.- `Jclnnelled in the end standards 10A as at 12 are a pair of horizontally arranged shafts 13. The Ireference numeral;v 14 designates a pair of intermediate standards.V rl'hese standards 14 support the intermediate portions of the shafts 13- by meansV of bearings `15. Fixed to each of the shafts.- 1,43 a worm gearv wheel 16, best seen in 'I'hese.wormy gear wheels 1.6. meshwith wenn scars. 17 arranged upon Crosssnattl.; 'Ihisfcrsje Shaft `1,8 is. arnvided with a pair of hand wheels 19r whereby thel shafts 13 may be operated. 'Ihe function of the shafts 13 is that of elevating and lowering a arranged intermediate of the end rack bars. This is to provide stability in the uniform upward movement of the table. Each rack bar 21 meshes with pinions 22 upon each of the horizontal shafts 13. Thus, as the hand wheels are moved in the proper direction, motion is transmitted through worm gears 17 and worm gear wheels 16 to drive shafts 13 for elevating or lowering the table 20.

Fixed upon the top of the table 20 are a plurality of spaced longitudinally arranged rails 23 off rectangular cross-section. In practice the rails are made of tubing in order to lighten the structure. These rails 23 are arranged, in the upward movement of the table, to pass between spaced xed rails 24 carried by the end standards 10. These rails 24 are also of rectangular crosssection and are preferably made of tubing. Removably mounted above the rails 23 and 24 is a frame made up of side pieces which in practice are designed to rest upon the upper surfaces of the outermost rails 24 and have detachable connection with the end standards 12 by means of latches 26. The side rails 25 are apertured as at 27, see Figs. 3 and 5. Arranged to detachably t between the side rails 25 are end pieces 28. Each'end piece is provided with a laterally extended pin 29 for engaging a selective aperture 2'7 of a side rail 25. This construction constitutes what may be termed a dowel-pin construction. The inner faceof :each end piece 28 is slotted as at 30 to accommodate the end of reinforcing rods 31 as employed in a floor slab'32, as shown in Figs. '7 and 8. This particular form of slab and reinforcing rod is shown'V in my afore-v` said Letters Patent. In order to support the ends oor slabs 32.

A description will now be given of the mode of operating the above described apparatus. Primarily', the table 20 with its spaced rails is adjustable'to give the proper depth of space between the immovablerails'24 in order that theribs 35 of desired height may loe-secured for the floor slabs 32.r This having been done, the end members-'22 are positioned upon the tops of the immovable rails 24, and the side rails 25 of the frame used in molding the floor slabs are fitted to place so that a dowel-pin'connection is obtained. The latches 26 are thenturn'ed to place, thus interlocking the molding frame with respect to the upper part of the machine, as is clearly shownk in Fig.4. The reinforcing rods V31 are then caused to engage within the spaces between the immovable rails 24 and the rail tables 23, as is best seen in Fig. 4. At this time a cementitious fill is introduced with respect to the molding frame and the same permitted to set, whereupon the latches 26 are released and the side rails 25 and end members 28 removed from the top of the machine and the `floor slab removed.

Among the advantages to be claimed for the above described apparatus, mention may be made of the fact that the operator has access to both sides of the machine in using the hand wheels 19 and that very slight adjustments as to depth of spaces between the table rails and the immovable rails may be obtained both by reason of the vertically adjustable table and the replaceable rails 34 of the end members 28.

A further advantage resides in the fact that the molding frame may be easily set up and taken down, thus expediting time taken in a molding period. The parts are simple, inexpensive to manufacture, and reliable in operation; and very little if any effort is required to adjust and manipulate the said parts.

A further advantage is to take care of varied lengths. and heights of slabs in a molding process.

What is claimed is:-

1. A machine for forming a block from plastic material comprising a stationary table, said table being provided with longitudinal parallel slots in the Abottom thereof, and means, removably positioned in said slots; the side Walls-of said -slots lying in planes normal tothe plane of said table, in contact with-thesides thereof, for formingportions of one face ofy said block, said table forming means for forming the remaining porto said last named means at predetermined positions intermediate their ends for forming ends on said block.

3. A machine for forming blocks from plastic material comprising 'a stationary table, vlongitudinal parallel slots in said table, meanspassing through said slots and co-operating with said table. to form one `face of a block, means detachably connected to said table for forming'. sides of said block, and means connected to said sides at ilo a position intermediate the ends of the slots in said table for forming ends on said block.

FREDERICK M. vENziE. 

